From f12b38afbcdb186c5e3e4d0936a1319976e36863 Mon Sep 17 00:00:00 2001 From: 1122455801 Date: Fri, 17 May 2019 14:58:02 +0800 Subject: [PATCH] Delete datarecoder.md --- docs/datarecoder.md | 271 -------------------------------------------- 1 file changed, 271 deletions(-) delete mode 100644 docs/datarecoder.md diff --git a/docs/datarecoder.md b/docs/datarecoder.md deleted file mode 100644 index 8c3bc076..00000000 --- a/docs/datarecoder.md +++ /dev/null @@ -1,271 +0,0 @@ -# 行情记录 -行情记录模块用于实时行情的收录: -- 连接上接口后并且启动行情记录模块; -- 通过本地合约(vt_symbol)添加记录任务; -- 后台会自动调用行情API接口的suscribe()函数自动订阅行情; -- 行情信息通过database_manager模块的save_bar_data()函数/save_tick_data()函数载入到数据库中。 - -注意:目前vnpy支持的数据库为SQLite/ MySQL/ PostgreSQL/ MongoDB。若用户使用MongoDB,则行情记录数据直接载入到MongoDB中。 - -  - - - -## 加载启动 -进入VN Trader后,首先登陆接口,如连接CTP;然后在菜单栏中点击“功能”->"行情记录“后,会弹出行情记录窗口,如图。 -![](https://vnpy-community.oss-cn-shanghai.aliyuncs.com/forum_experience/yazhang/data_recoder/datarecoder.png) - -此时行情记录模块的启动状态为True,会启动while循环,可以添加任务实现实时行情记录。 -``` - def start(self): - """""" - self.active = True - self.thread.start() - - def run(self): - """""" - while self.active: - try: - task = self.queue.get(timeout=1) - task_type, data = task - - if task_type == "tick": - database_manager.save_tick_data([data]) - elif task_type == "bar": - database_manager.save_bar_data([data]) - - except Empty: - continue -``` - -  - -## 开始收录 - -- 在“本地代码”选择输入需要订阅的行情,如rb1905.SHFE; -- 然后点击后边“K线记录”或者“Tick记录”中的“添加”选项,会把记录特定品种任务添加到data_recorder_setting.json上,并且显示到“K线记录列表”或者“Tick记录列表”中,如图。 -- 通过queue.put()与queue.get()异步完成收录行情信息任务。 - -![](https://vnpy-community.oss-cn-shanghai.aliyuncs.com/forum_experience/yazhang/data_recoder/start.png) - -  - -下面介绍行情收录的具体原理:若无合约记录的历史,用户需要先添加行情记录任务,如连接CTP接口后记录rb1905.SHFE的tick数据,然后调用add_tick_recording()函数执行下面工作: -1) 先创建tick_recordings字典; -2) 调用接口的suscribe()函数订阅行情; -3 )保存该tick_recordings字典到json文件上; -4) 推送行情记录事件。 - -``` - def add_tick_recording(self, vt_symbol: str): - """""" - if vt_symbol in self.tick_recordings: - self.write_log(f"已在Tick记录列表中:{vt_symbol}") - return - - contract = self.main_engine.get_contract(vt_symbol) - if not contract: - self.write_log(f"找不到合约:{vt_symbol}") - return - - self.tick_recordings[vt_symbol] = {} - "symbol": contract.symbol, - "exchange": contract.exchange.value, - "gateway_name": contract.gateway_name - } - - self.subscribe(contract) - self.save_setting() - self.put_event() - - self.write_log(f"添加Tick记录成功:{vt_symbol}") -``` - -下面对add_tick_recording()函数里面调用的子函数进行扩展: - -### 订阅行情 - -调用main_engine的suscribe()函数来订阅行情,需要填入的信息为symbol、exchange、gateway_name -``` - def subscribe(self, contract: ContractData): - """""" - req = SubscribeRequest( - symbol=contract.symbol, - exchange=contract.exchange - ) - self.main_engine.subscribe(req, contract.gateway_name) -``` - -  - -### 将订阅信息保存到json文件 - -- 主要把tick_recordings或者bar_recordings通过save_json()函数保存到C:\Users\Administrator\\.vntrader文件夹内的data_recorder_setting.json上。 -- 该json文件用于存放行情记录的任务,当每次启动行情模块后,会调用load_setting()函数来得到tick_recordings和bar_recordings字典,进而开始记录的任务。 -``` -setting_filename = "data_recorder_setting.json" - def save_setting(self): - """""" - setting = { - "tick": self.tick_recordings, - "bar": self.bar_recordings - } - save_json(self.setting_filename, setting) - - def load_setting(self): - """""" - setting = load_json(self.setting_filename) - self.tick_recordings = setting.get("tick", {}) - self.bar_recordings = setting.get("bar", {}) -``` - -  - -### 推送行情记录事件 - -- 创建行情记录列表tick_symbols和bar_symbols,并且缓存在data字典里; -- 创建evnte对象,其类型是EVENT_RECORDER_UPDATE, 内容是data字典; -- 调用event_engine的put()函数推送event事件。 - -``` - def put_event(self): - """""" - tick_symbols = list(self.tick_recordings.keys()) - tick_symbols.sort() - - bar_symbols = list(self.bar_recordings.keys()) - bar_symbols.sort() - - data = { - "tick": tick_symbols, - "bar": bar_symbols - } - - event = Event( - EVENT_RECORDER_UPDATE, - data - ) - self.event_engine.put(event) -``` - -  - -### 注册行情记录事件 - -register_event()函数分别注册2种事件:EVENT_CONTRACT、EVENT_TICK -- EVENT_CONTRACT事件,调用的是process_contract_event()函数: 从tick_recordings和bar_recordings字典获取需要订阅的合约品种;然后使用subscribe()函数进行订阅行情。 -- EVENT_TICK事件,调用的是process_tick_event()函数:从tick_recordings和bar_recordings字典获取需要订阅的合约品种;然后使用record_tick()和record_bar()函数,把行情记录任务推送到queue队列中等待执行。 - -``` - def register_event(self): - """""" - self.event_engine.register(EVENT_TICK, self.process_tick_event) - self.event_engine.register(EVENT_CONTRACT, self.process_contract_event) - - def process_tick_event(self, event: Event): - """""" - tick = event.data - - if tick.vt_symbol in self.tick_recordings: - self.record_tick(tick) - - if tick.vt_symbol in self.bar_recordings: - bg = self.get_bar_generator(tick.vt_symbol) - bg.update_tick(tick) - - def process_contract_event(self, event: Event): - """""" - contract = event.data - vt_symbol = contract.vt_symbol - - if (vt_symbol in self.tick_recordings or vt_symbol in self.bar_recordings): - self.subscribe(contract) - - def record_tick(self, tick: TickData): - """""" - task = ("tick", copy(tick)) - self.queue.put(task) - - def record_bar(self, bar: BarData): - """""" - task = ("bar", copy(bar)) - self.queue.put(task) - - def get_bar_generator(self, vt_symbol: str): - """""" - bg = self.bar_generators.get(vt_symbol, None) - - if not bg: - bg = BarGenerator(self.record_bar) - self.bar_generators[vt_symbol] = bg - - return bg -``` - -  - -### 执行记录行情任务 - -在while循环中,从queue队列读取任务,调用save_tick_data()或者save_bar_data()函数来记录数据,并且载入到数据库中。 -``` - def run(self): - """""" - while self.active: - try: - task = self.queue.get(timeout=1) - task_type, data = task - - if task_type == "tick": - database_manager.save_tick_data([data]) - elif task_type == "bar": - database_manager.save_bar_data([data]) - - except Empty: - continue -``` - -  - - - - -## 移除记录 - -移除记录操作:输入需要移除合约品种的本地代码,如rb1905.SHFE。该本地代码必须在“Tick记录列表” 或者“K线记录列表”中。若要移除Tick记录,只需在”Tick记录“那一栏上点击”移除“按钮即可。 - -下面展示代码运作原理: - -- 从tick_recordings字典移除vt_symbol -- 调用save_setting()函数保存json配置文件 -- 推送最新的tick_recordings字典来继续记录行情,原来移除合约品种不再记录。 -``` - def remove_tick_recording(self, vt_symbol: str): - """""" - if vt_symbol not in self.tick_recordings: - self.write_log(f"不在Tick记录列表中:{vt_symbol}") - return - - self.tick_recordings.pop(vt_symbol) - self.save_setting() - self.put_event() - - self.write_log(f"移除Tick记录成功:{vt_symbol}") -``` - -  - -## 停止记录 - -停止记录操作:只需手动关闭行情记录模块窗口就停止记录行情。 - -- 记录行情状态改为False, 停止while循环; -- 调用join()函数关掉线程。 - -``` - def close(self): - """""" - self.active = False - - if self.thread.isAlive(): - self.thread.join() -``` \ No newline at end of file